The Liberator Gunshop, an airsoft shop in Osaka, Japan, shows the SRU Glock PDW Conversion kit.... "This is a conversion kit that you can easily change the Glock to PDW-style with stock. Because it can be easily done with a a few screws, even people who will customize for the first time assemble it easily. Pay attention to the screw as it is the only part that you might easily lose."